Figure 6From: Effect of Size-Dependent Thermal Instability on Synthesis of Zn2 SiO4-SiO x Core–Shell Nanotube Arrays and Their Cathodoluminescence Propertiesa, b, and c TEM and SEM images, and corresponding 310 nm CL emission image of representative nanotubes dispersed on a TEM grid. Three nanotube types are labeled as I, II, and III, and indicated by arrows, respectively. Note that type I nanotubes consist of two nanotubes of small diameter. The scale bars are 200 nmBack to article page